The process of focusing on near or distant objects involves:
A) The lens becoming flatter to focus on near objects
B) The lens becoming flatter to focus on distant objects
C) Contraction of the iris muscles to constrict the pupil
D) Contraction of the iris muscles to dilate the pupil
Correct Answer:
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Q1: For humans,visible light falls within the range
Q2: Wavelengths of light in the 500-570 nm
Q3: Collectively,the rods and cones are known as:
A)Ganglion
Q4: Humans can "see" only about _ of
Q6: The photoreceptors:
A)Are sandwiched between the bipolar and
Q7: When light strikes photoreceptors,which of the following
Q8: When light hits photoreceptors,the photoreceptors _,and the
Q9: The cell membranes of photoreceptors contain sodium
Q10: When light strikes a molecule of photopigment,the
Q11: What role do the muscles connected to
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